Free to understand.
Pay only to ship.
The whole understand-your-circuit loop is free, forever — up to 10 designs. Upgrade when you need more room, private projects, or manufacturing-grade output.
- ✓The full understand-loop — blocks, hover & drill-in, expand-to-discrete
- ✓The core checking engine — voltage & current follow every wire, so over-voltage, blown budgets, shorts, and reverse polarity get caught where they'll actually happen
- ✓Connectors that know their pinout — USB & battery pins arrive pre-declared, and per-contact current ratings are checked
- ✓What-if stress tests + a growing set of free engineering calculators
- ✓Version history — your latest 5 checkpoints, with loss-proof restore
- ✓PCB editor with DRC; export design JSON + KiCad netlist
- ✓Up to 10 designs — public or unlisted, like a public repo (private comes with Pro)
- ✓Community block library
- ✓ANSI / IEC symbols and Light · Mid · Dark themes
- ✓Sparky — the AI engineer: builds and wires blocks, authors real chips from a part number, declares the board edge, runs the stress test — and every claim it makes passes through the checking engine, so it can't bluff you
- ✓Signal-integrity analysis — declare a net RS-485 / CAN / I2C / USB and the physics is enforced: termination present, rise time achievable from your pull-ups, trace lengths & pair matching checked on the PCB
- ✓Galvanic-isolation guarantees — declare that two blocks share no conductive path; re-verified on every edit, and a violation names the exact net that bridged the barrier
- ✓Manufacturing export — the routed board as .kicad_pcb + BOM CSV, ready for any fab workflow
- ✓Private designs — enforced down at the database layer, not just hidden in the UI
- ✓Unlimited designs — no cap
- ✓Deep version history on every design
- ✓Priority support
- ✓Shared team workspaces
- ✓Roles & permissions
- ✓Single sign-on (SSO)
- ✓Centralized billing & admin
What the checking engine catches — on every change
Not a simulator you have to set up — instant, deterministic checks on the numbers your design declares. Every finding says where and why. The core checks are free forever; the professional analyses come with Pro.
Voltage, end to end
Supply ranges propagate through every wire — a 24 V brick feeding a 15 V-max chip gets caught, even three blocks downstream of where the wire started.
Current & power budgets
Every load charges back to its rail. See each rail's headroom live, and get flagged when a source can't carry what's hanging off it.
Wiring sanity
Shorts, reverse polarity, two outputs fighting on one net, undriven rails, open pins, regulators dissipating more heat than their package survives.
The board edge
Connector pins carry declarations — what arrives, what leaves, and each contact's current rating. 4 A through a 2 A battery contact is an error before it's a melted housing.
Galvanic isolation
ProDeclare that two blocks must share no conductive path. The moment anything bridges the barrier — usually a shared ground — the finding names the net that did it.
Signal integrity
ProDeclare a net RS-485, CAN, I2C, or a USB pair, and the rules follow: missing termination, pull-ups too weak for the rise time, traces too long for the edge rate, mismatched pairs.
Free to understand. Pro to ship.
Hobby gives you the entire understand-loop and up to 10 designs — plenty to learn and prototype, in the open. Pro lifts the cap and unlocks private projects and manufacturing-grade output, for when you're building real hardware.
Every check, solve, and frequency sweep runs in your browser, on your machine. We couldn't meter your analysis if we wanted to — so it's unlimited on every plan, forever. No quotas, no credits, no counting.
No simulation setup, no server round-trip, no convergence roulette. The engine re-checks your whole design in milliseconds on every change — and being closed-form, the same design gives the same answer, every single time.
Your design lives in your browser and never leaves it until you choose to sync. Work on sensitive hardware without trusting anyone's cloud — including ours — until you decide to.
Questions
$15/month is the planned price once Electrace leaves alpha. Early adopters pay $9 — and keep $9 for as long as they stay subscribed. You're taking a chance on a young tool; the discount is permanent thanks.
Yes — forever. The entire understand-loop is free: blocks, hover & drill-in, expand-to-discrete, the core checking engine (voltage propagation, current budgets, shorts, polarity, connector ratings), the PCB editor with DRC, and the calculators — with up to 10 designs. We never charge you to learn.
The professional-grade layer: Sparky (the AI engineer), signal-integrity analysis, galvanic-isolation guarantees, manufacturing export (the routed board + BOM CSV), private designs, and unlimited designs — for when you're shipping real hardware. Version history is on the way.
On Hobby, designs are public or link-only (unlisted) — like a public repo. Keeping designs fully private is a Pro feature, for when you need to hold work to yourself. You'll see this before you save your first design, not after.
Yes — the upgrade flow offers monthly or yearly, and yearly is the best value. Cancel anytime; Pro runs to the end of what you paid for, and your designs are never deleted.
Start understanding your circuits.
No card, no catch — the understand-loop is free.